There are a few problems here that my app is ment to solve, other than VPN using PPTP. Number 1: folks are changing IP just because the can, as to annoy the other people in the network with Win XP screaming... Number 2: folks will change PPTP users/passwords among them, to benefit from higher bandwidth. This cannot be achived with this program, as it is tied to the computer it was instaled by my technicians (TIED = motherboard Serial Number, HDD Serial Number. etc.). Number 3: folks trying to change their MACs will be caught and their acts will be logged. A message will be printed as to make them see that this are not proper manners and discourage them from trying again. Hopefully. Downsides: if the user uninstalles the software...I can do nothing about it, but limit internet and partial network access (where management switches and routers are placed).So my solution does no more good than a rub on a wodden leg. But with the app installed, we are sure of better results than with PPTP. Even the psichological ones are good. > for user verification pptp can be used. its free :-) > > On 5/31/05, cristian_dimache@xxxxxxxxx <cristian_dimache@xxxxxxxxx> wrote: >> >> Yes, I have this problem too. And I came up with two ideas: one money >> comsuming, one time consuming. >> >> Money comsuming: get management switches everywhere, and limit MAC >> learning per port. My network amounts to 500+ stations, over a preety >> wide >> area (all on ethernet), costs evaluated at 30.000$. Rather expensive, >> ha? >> >> Time consuming: get into every windows workstation a program that alows >> network connection if MAC is unchanged from the one stored localy in an >> encrypted file. >> >> Boss evaluated my ideas, and, guess what? I am now working on the >> program >> described above. >> >> It will be publicly available, of course... >> >> > On Mon, 30 May 2005 20:41:20 +0200 Konrad <kcem@xxxxxxx> wrote: >> > >> >>Is any way to detect changed MAC adresses? >> > I have been working on this for some time. You can try the current >> > version: >> > http://shurdeek.routehat.org/tmp/dhcpwatch2.pl >> > >> > (please don't ask how it works, I'm pretty busy now :-)). >> > >> >>Someone taught change MACs peoples in my network and I have problems. >> > Yeah I know, I have seen this too. >> > >> >>E.g. Two computers working on one MAC, and one IP (static ARP and >> DHCP). >> > Exactly. >> > >> >>WinXP is screaming some message... that two computers or more have the >> >>same IP. >> > Actually this happens when people use the same IP but a *different* >> MAC. >> > >> > Yours sincerely, >> > Peter >> > _______________________________________________ >> > LARTC mailing list >> > LARTC@xxxxxxxxxxxxxxx >> > http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc >> > >> >> >> _______________________________________________ >> LARTC mailing list >> LARTC@xxxxxxxxxxxxxxx >> http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc >> > > > > -- > Mi³ego Dnia > Krystian Antoni > _______________________________________________ LARTC mailing list LARTC@xxxxxxxxxxxxxxx http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc
